Data from a four-mooring array deployed across the shelf and slope of Mackenzie Canyon, from 2016 to 2018, are used to characterize wind-driven upwelling and downwelling events and investigate their impact on the transport of water masses. We distinguish between coastal upwelling/downwelling forced by the along-coast wind stress, and canyon upwelling/downwelling associated with the wind stress curl in the Canada Basin. During coastal upwelling (downwelling), the isopycnals slope upward (downward) above the shelf bathymetry, and the normally westward-flowing shelf current is strengthened (reversed). During canyon upwelling (downwelling), the isopycnals slope upward (downward) progressing onshore relative to the background condition, and the cyclonic recirculation in the canyon is stronger (weaker), with an up-canyon (down-canyon) component on the upper slope. During periods of simultaneous coastal and canyon upwelling, Atlantic Water from the basin can be fluxed onto the shelf. These occurrences are dictated by the combination of three factors: the coastal upwelling strength, canyon upwelling strength, and the background depth of the offshore Pacific Water-Atlantic Water interface. Dense winter water is formed on the shelf by enhanced air-sea buoyancy flux during freeze-up and subsequent openings in the ice. During simultaneous coastal and canyon downwelling this water be fluxed offshore into the canyon, with the potential to ventilate the interior halocline.

2016 年至 2018 年部署在 Mackenzie Canyon 大陆架和斜坡上的四系泊阵列的数据用于表征风力驱动的上升流和下降流事件，并研究它们对水团运输的影响。我们区分了沿海岸风应力强迫的沿海上升流/下降流，以及与加拿大盆地风应力卷曲相关的峡谷上升流/下降流。在沿海上升流（下流）期间，等密度线在陆架水深上方向上（向下）倾斜，通常向西流动的陆架流得到加强（逆转）。在峡谷上升流（downwelling）过程中，等密度线相对于背景条件在陆上向上（向下）倾斜，峡谷中的气旋再循环较强（较弱），在上部斜坡上有一个上峡谷（down-canyon）组件。在沿海和峡谷同时上升流期间，来自盆地的大西洋水可以流入陆架。这些事件由三个因素的组合决定：沿海上升流强度、峡谷上升流强度和近海太平洋水-大西洋水界面的背景深度。在冻结和随后的冰层开口期间，通过增强的海气浮力通量在陆架上形成密集的冬季水。在沿海和峡谷同时下流期间，这些水从海上流入峡谷，有可能使内部盐层通风。这些事件由三个因素的组合决定：沿海上升流强度、峡谷上升流强度和近海太平洋水-大西洋水界面的背景深度。在冻结和随后的冰层开口期间，通过增强的海气浮力通量在陆架上形成密集的冬季水。在沿海和峡谷同时下流期间，这些水从海上流入峡谷，有可能使内部盐层通风。这些事件由三个因素的组合决定：沿海上升流强度、峡谷上升流强度和近海太平洋水-大西洋水界面的背景深度。在冻结和随后的冰层开口期间，通过增强的海气浮力通量在陆架上形成密集的冬季水。在沿海和峡谷同时下流期间，这些水从海上流入峡谷，有可能使内部盐层通风。